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Q21. - (Topic 1)
When the command echo $$ outputs 12942, what is the meaning of 12942?
A. It is the process ID of the echo command.
B. It is the process ID of the current shell.
C. It is the process ID of the last command executed.
D. It is the process ID of the last command which has been placed in the background.
Answer: B
Q22. - (Topic 6)
When trying to unmount a device it is reported as being busy. Which of the following commands could be used to determine which process is causing this?
A. debug
B. lsof
C. nessus
D. strace
E. traceroute
Answer: B
Q23. - (Topic 4)
What is true about the ntpdate command?
A. It is the primary management command for the NTP time server.
B. It updates the local system's date (i.e. day, month and year) but not the time (i.e. hours, minutes,seconds).
C. It queries one or more NTP time servers and adjusts the system time accordingly.
D. It sends the local system time to one or many remote NTP time servers for redistribution.
E. It can be used by any user to set the user clock independently of the system clock.
Answer: C
Q24. - (Topic 5)
Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct answers.)
A. 127.0.0.0/8
B. 10.0.0.0/8
C. 169.255.0.0/16
D. 172.16.0.0/12
E. 192.168.0.0/16
Answer: B,D,E
Q25. - (Topic 6)
Which of the following programs uses the hosts.allow file to perform its main task of checking for access control restrictions to system services?
A. tcpd
B. inetd
C. fingerd
D. mountd
E. xinetd
Answer: A
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Q26. - (Topic 3)
Which commands can be used to change a user's account aging information? (Choose THREE correct answers.)
A. usermod
B. passwd
C. chattr
D. chage
E. chsh
Answer: A,B,D
Q27. - (Topic 5)
Which of the following lines are valid in the file /etc/hosts? (Choose TWO correct answers.)
A. 2001:db8::15 www.example.com www
B. www.example.com www 203.0.13.15
C. 203.0.113.15 www.example.com www
D. www.example.com,www 203.0.13.15,2001:db8::15
E. 2003.0.113.15,2001:db8::15 www.example.com www
Answer: A,C
Q28. CORRECT TEXT - (Topic 5)
Which keyword must be listed in the hosts option of the Name Service Switch configuration file in order to make host lookups consult the /etc/hosts file?
Answer: files
Q29. - (Topic 1)
What output will the following command produce?
seq 1 5 20
A. 1 6 1 1 1 6
B. 1 5 10 15
C. 1 2 3 4
D. 2 3 4 5
E. 5 10 15 20
Answer: A
Q30. - (Topic 4)
Which of the following is observed and corrected by a NTP client?
A. The skew in time between the system clock and the hardware clock.
B. The skew in time between the system clock and the reference clock.
C. Changes in the time zone of the current computer's location.
D. Adjustments needed to support Daylight Saving Time.
Answer: B